Transport Property Measurements of HFC-236ea
Abstract
The report gives results of an evaluation of transport properties of 1, 1, 1, 2, 3, 3-hexafluoropropane (HFC-236ea), with liquid viscosity and thermal conductivity being the two main transport properties of interest. In addition, the specific heat and density of refrigerant/lubricant mixtures are also provided in this study. (NOTE: HFC-236ea is currently a candidate to replace 1, 2-dichloro-tetrafluoroethane (CFC-114) in surface craft and submarine chiller units.) The study used a novel method for simultaneously measuring viscosity and thermal conductivity, using inline property sensors in series with a heat transfer measurement system. Specifically, viscosity was measured with an inline torsional oscillation viscometer, and thermal conductivity was measured from the knowledge of single-phase heat transfer characteristics of a heated test section. The viscosity and thermal conductivity measurements for CFC-114 were compared with ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) data: agreement was within +/-5% for thermal conductivity and +/-2% for viscosity. For HFC-236ea, the measured data were compared with REFPROP, a theoretical prediction package developed by the NIST (National Institute of Standards and Technology): average deviations were within +15% in thermal conductivity, and -5% in viscosity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1998
- Accession Number
- ADA364048
Entities
People
- J. Y. Lin
- M. B. Pate
Organizations
- Iowa State University